The HV capacitors will need to be reformed, not a problem as I have a regulated HV supply and a variac and a HV probe.

The 3-500Z's will also need to be reconditioned - the procedure is well documented on the web.

The SB series amps are far easier to work on than the 30L1's.  But in both cases, there are lots of parts available.


Tim AA6DQ



On Wednesday, January 24, 2024 at 12:06:17 PM EST, Cal Fuhrman <[email protected]> wrote:


That amp was very popular and many hundreds of them were sold.  There are parts carcasses available in the “right” places, known to restorers of the dark, mysterious and wonderful ancient art of ham tube radio.  The only serious issues with such an amp are two questions:

  1. Does it come with verifiably good 3-500 final tubes?
  2. Does it come with the power transformer/choke combination?

 

Everything else is either findable or replaceable.

 

It will be a fun project for who-ever decides to dive in.

 

73 – Cal

 

 

From: Larry Sheridan
Sent: Wednesday, January 24, 2024 8:52 AM
To: George Briggs
Cc: Club TVARC
Subject: Re: [TVARC] Heathkit SB-220 help

 

Ahhh ... I hear that ... spoken like someone who has a long & glorious history with The Green Boxes ... Grin!!

 

On Wed, Jan 24, 2024, 1:02 AM George Briggs <[email protected]> wrote:

Hi Larry,

No, I haven’t inventoried it. I’m afraid that if I do, I’ll end up trying to put it together myself, and I just don’t have the time.

George 

Sent from my iPhone



On Jan 23, 2024, at 10:49 PM, Larry Sheridan <[email protected]> wrote:



 

Hi George -

 

Sounds like an interesting project, can you tell if all the pieces are with it?  A rebuild/reassemble would probably want to be replacing

the electrolyte caps ... they're likely easy to get to, anyway ...

 

Larry K8XR

 

On Tue, Jan 23, 2024 at 7:43 PM George Briggs <[email protected]> wrote:

Clubmates,
Recently I was given a Heathkit SB-220 amplifier to keep, sell, or donate to the club. The catch is that the amplifier is in pieces - partially assembled.
Does anyone want to have some fun putting the pieces together? I believe that an assembled amp, even if it doesn’t work, would fetch more money for TVARC than one that is in pieces. BTW, the tubes are part of the pieces.
Any interest?
Failing that, anyone want to make a reasonable offer for the parts?
73,
George K2DM

Sent from my iPhone
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